Closure for bags of synthetic material



Sept. 26, 1961 E. SCHUMM 3,001,254

CLOSURE FOR BAGS OF SYNTHETIC MATERIAL Filed July 31, 1957 INVENTORMIMI,

Mimi

ATTORNEY Unite States Patent 3 001,254 CLOSURE FOR BAGS F SYNTHETICMATERIAL Erich Schumm, 17 Siegelsberger Strasse, Murrhardt, Wurttemburg,Germany Filed July 31, 1957, Ser. No. 675,362 Claims priority,application Germany Aug. 4, 1956 3 Claims. (Cl. 24-305) This inventionrelates to closures for bags, for example of synthetic plastic material.

According to the invention there is provided a bag closure characterisedin that an open end of the bag is folded up and clamped fast between twofaces of a substantially rigid clamp or clip arrangement; the latter ispreferably formed of synthetic plastic material.

Thus the invention provides in an advantageous manner a closure forpacking or like bags, which is simple in its construction and can beproduced cheaply, does not make the substantially air-tight packing ofany desired articles in synthetic plastic bags (which are preferablytransparent) appreciably more expensive, but nevertheless closes the bagreliably and in substantially air-tight fashion, and can be used asoften as desired.

An embodiment of the invention can be so constructed that two closureparts inter-engaging after the style of a press stud are connected withone another by a flexible web, and this web surrounds the folded bag endand clamps it fast in itself. Here the clamping effect of the web canadvantageously be increased if the web is provided in one half with arib-shaped projection and in the other half with a recess, in which therib engages when the closure closes. Furthermore a joint or a point ofgreater flexibility can be provided between the two halves of the web,which in themselves are as rigid as possible. The opening and closing ofthe press-stud connection can be facilitated in accordance with theinvention when on one hand the inner part of the press-stud connectionis provided with a closure face and possibly its edge recedes somewhatat the edge remote from the web and on the other side the outer part isprovided with an edge projection. In the case of this form of embodimentof the object of the invention also advertisements can be provided bothon the web and on the inner part of the press-stud connection.

The invention is, illustrated by way of example by reference to theembodiment in the accompanying drawings, wherein:

FIGURE 1 shows in section, a closure with a clip web and a press-studconnection, and

FIGURE 2 shows a perspective representation of a bag end closed with theclosure of FIGURE 1.

The bag closure represented in FIGURES l and 2 consists of a web 19 instrip form, which is halved by a part 20 which is made hinged. This canconsist for example of a part with slighter wall thickness, while theother part of the web 19 is made relatively rigid. Alternatively the twohalves of the web can be connected with one another by a hinge. On onehalf of the web 19 a rib 21 is attached on one side, and in the otherhalf an opening 22 is provided, the internal width of which is somewhatgreater than the base area of the rib 21. At one end of the web 19 thereis provided a disc 23 with an annular groove 24. At the other end of theweb there is a ring 25, the internal width of which correspondsapproximately to Patented Sept. 26, 1961 the minimum diameter of theannular groove 24, and which can be provided for example on the sidelying opposite to the web 19 with a projecting tongue 26. The disc 23,with groove 24 forms with the ring 25 and tongue 26 a press-stud-likeconnection, and the folded end of the bag 27 is closed, as may be seenfrom FIGURE 2, due to the fact that the two halves of the web 19 arefolded together over the bag end, the rib 21 penetrating into the recess22 and the bag end bulging towards one side in this recess 22. The ring25 is pushed over the disc 23 and catches in the annular groove 24, sothat the two halves of the web 19 with the clamped-in bag end are heldfirmly together by this press-studlike connection.

I claim:

1. A closure device for a bag or the like, comprising, in combination,two substantially rigid closure portions hingedly connected by anintegral flexible portion, and movable relative to each other between anon-overlapping disengaged position and an engaged substantiallyabutting position, substantially superimposed upon each other, one ofsaid closure portions being formed with an opening therethrough having apredetermined circumferential outline; a rigid and solid projection onthe other closure portion having a circumferential outline which isthroughout the height thereof similar to but slightly smaller than thecircumferential outline of said opening in said one closure portion andarranged so that in engaged superimposed position of said closureportions said projection projects through said opening and beyond saidone closure portion leaving between itself and the edge of said openinga slot; and releasable locking means for locking said closure portionsin said engaged superimposed position thereof Whenever desired whereby abag or the like may be securely closed by placing an end portion of thebag over said opening in said one closure portion and on the sidethereof facing in the engaged position the other closure portion so thatduring moving of said portions of said engaged position the bag andportion will be partly deflected through said opening by engagement withsaid projection without being subjectedto excessive stresses during thisdeflection.

2. A closure device as defined in claim 1 in which said locking meansincludes a fiat disc fixedly fastened by a fiat surface thereof to oneof said substantially rigid closure portions and in which the other ofsaid closure portions is formed with an opening therein mating said discfor locking engagement.

3. A closure device as defined in claim 2 in which said flat disc isformed with an annular groove in the circumference thereof and in whichsaid opening in the other of said closure portions mates said annulargroove for locking engagement.

References Cited in the file of this patent UNITED STATES PATENTS651,128 Arnemann June 5, 1900 1,354,236 Bour Sept. 28, 1920 1,482,662Sheppard Feb. 5. 1924 1,886,882 Huber Nov. 8, 1932 1,945,932 Caley Feb.6, 1934 2,460,963 Young Feb. 8, 1949 2,540,516 Glasco Feb. 6, 19512,818,871 Beaudry Jan. 7, 1958

